export const ROW_HEIGHT = 64;
export function formatMonthTitle(date) {
	if (!(date instanceof Date)) {
		date = new Date(date);
	}
	return `${date.getFullYear()}年${date.getMonth() + 1}月`;
}
export function compareMonth(date1, date2) {
	if (!(date1 instanceof Date)) {
		date1 = new Date(date1);
	}
	if (!(date2 instanceof Date)) {
		date2 = new Date(date2);
	}
	const year1 = date1.getFullYear();
	const year2 = date2.getFullYear();
	const month1 = date1.getMonth();
	const month2 = date2.getMonth();
	if (year1 === year2) {
		return month1 === month2 ? 0 : month1 > month2 ? 1 : -1;
	}
	return year1 > year2 ? 1 : -1;
}
export function compareDay(day1, day2) {
	if (!(day1 instanceof Date)) {
		day1 = new Date(day1);
	}
	if (!(day2 instanceof Date)) {
		day2 = new Date(day2);
	}
	const compareMonthResult = compareMonth(day1, day2);
	if (compareMonthResult === 0) {
		const date1 = day1.getDate();
		const date2 = day2.getDate();
		return date1 === date2 ? 0 : date1 > date2 ? 1 : -1;
	}
	return compareMonthResult;
}
export function getDayByOffset(date, offset) {
	date = new Date(date);
	date.setDate(date.getDate() + offset);
	return date;
}
export function getPrevDay(date) {
	return getDayByOffset(date, -1);
}
export function getNextDay(date) {
	return getDayByOffset(date, 1);
}
export function getToday() {
	const today = new Date();
	today.setHours(0, 0, 0, 0);
	return today;
}
export function calcDateNum(date) {
	const day1 = new Date(date[0]).getTime();
	const day2 = new Date(date[1]).getTime();
	return (day2 - day1) / (1000 * 60 * 60 * 24) + 1;
}
export function copyDates(dates) {
	if (Array.isArray(dates)) {
		return dates.map(date => {
			if (date === null) {
				return date;
			}
			return new Date(date);
		});
	}
	return new Date(dates);
}
export function getMonthEndDay(year, month) {
	return 32 - new Date(year, month - 1, 32).getDate();
}
export function getMonths(minDate, maxDate) {
	const months = [];
	const cursor = new Date(minDate);
	cursor.setDate(1);
	do {
		months.push(cursor.getTime());
		cursor.setMonth(cursor.getMonth() + 1);
	} while (compareMonth(cursor, maxDate) !== 1);
	return months;
}
